{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "We conducted a double - blind , randomized phase II study to evaluate the safety and activity of combination therapy with N - butyl - deoxynojirimycin ( SC - 48334 ) ( an alpha - glucosidase I inhibitor ) and zidovudine versus zidovudine alone ."}
{"Chemical": ["N - butyl - deoxynojirimycin", "SC - 48334", "zidovudine"], "Disease": []}